Transceiver with wake up detection
a technology of wake up detection and transceiver, which is applied in the field of transceivers, can solve the problems of additional power consumption and the transceiver does not possess the function, and achieve the effect of lowering power consumption
Inactive Publication Date: 2015-03-17
NAT SUN YAT SEN UNIV
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Benefits of technology
The present invention relates to a transceiver for in-car communication systems that allows for wake up detection. The transceiver includes a primary control unit, transmission unit, and receiving unit. The primary control unit transmits first and second transmission signals, as well as idle signals to the transmission unit. The transmission unit comprises logic sets, loops, and transistors for processing the signals. The receiving unit has a comparator and logic sets for detecting a wake up signal and switching the operation mode of the transceiver to a normal mode, reducing power consumption. The technical effect of the invention is to enable a low power mode for the transceiver and quickly switch to a normal mode in response to the detection of a wake up signal.
Problems solved by technology
However, the conventional FlexRay transceiver does not possess the function of over current detection, when the internal current of the transceiver is excessive, the transceiver is not able to detect the condition of over current therefore leading to damage.
Besides, the conventional FlexRay transceiver does not possess the function of wake up detection.
Therefore, additional power consumption is occurred.
Method used
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Embodiment Construction
[0010]With reference to FIGS. 1, 2 and 3, a transceiver 100 with wake up detection in accordance with an embodiment of the present invention is applicable to in-vehicle communication system based on FlexRay protocol. The transceiver 100 includes a primary control unit 110, a transmission unit 120 and a receiving unit 130, wherein the primary control unit 110 provides and transmits a first transmission signal, a second transmission signal, a first idle signal and a second idle signal to the transmission unit 120. The transmission unit 120 electrically connects to the primary control unit 110 and comprises a first logic set 121, a second logic set 122, a third logic set 123, a first loop 124 and a second loop 125, wherein the first logic set 121 comprises a firs logic gate 121a and a second logic gate 121e, the second logic set 122 comprises a third logic gate 122a and a fourth logic gate 122e, the third logic set 123 comprises a fifth logic gate 123a and a sixth logic gate 123e elect...
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A transceiver with wake up detection includes a primary control unit, a transmission unit and a receiving unit, the transmission unit comprises a first logic set, a second logic set, a third logic set, a first loop, and a second loop. The first loop outputs a first differential signal, and the second loop outputs a second differential signal. The receiving unit comprises a wake up detection circuit having a first comparator, a second comparator and a fourth logic set. When the first comparator and the second comparator receive a first predetermined level of the first differential signal and a second predetermined level of the second differential signal, the fourth logic set outputs an idle state signal and a data signal to the primary control unit to make an operation mode of the transceiver switched from a low power mode to a normal mode.
Description
FIELD OF THE INVENTION[0001]The present invention is generally related to a transceiver, which particularly relates to the transceiver with function of wake up detection.BACKGROUND OF THE INVENTION[0002]A conventional FlexRay transceiver includes a FlexRay transmitter and a FlexRay receiver, the FlexRay transmitter includes a current mirror and a transmission gate, and the FlexRay receiver includes a hysteresis comparator, a window comparator and a charge-discharge pump. The transmission gate determines whether the current mirror generates a current according to a state code so as to provide voltage signals to a bus. The hysteresis comparator is used for comparison between a first input voltage and a second input voltage, and an output signal is generated based on comparison result. The window comparator is in connection with the hysteresis comparator. When the first input voltage and the second input voltage is within a voltage range, the window comparator outputs an idle state sig...
Claims
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IPC IPC(8): H04B1/38H04B1/40H04W52/02
CPCH04B1/40H04W52/0229Y02D30/70
Inventor WANG, CHUA-CHINCHEN, CHIH-LINLI, JIE-JYUNSUNG, GANG-NENGYEH, TAI-HAOJUAN, CHUN-YINGHOU, ZONG-YOU
Owner NAT SUN YAT SEN UNIV